Improvement in cylinder-cocks



J. A. ROBINSON. Cylinder-000k.

No. 222,738. Patnted Dec. 16,?879.

1&2, I z! WITNESSES: I INVBNTOR. fl/ 24%? 2 2 M I Mg TTORNEYS.

NJET RS, PHOTO LITHOGRAPHER WASHINGTON u C UNITED STATES PATENT OFFICE.

JAMES A. ROBINSON, OF NASHVILLE, TENNESSEE.

IMPROVEMENT IN CYLINDER-COCKS.

Specification forming part of Letters Patent No. 222,738, dated December 16, 1879; application filed October 1, 1879.

To all whom it may concern:

Be it known that 1, JAMES A.'ROBINs0N, of Nashville, in the county of Davidson and State of Tennessee, have invented a new and I Improved Cylinder-Cock, of which the follow- Similarletters of reference indicate corre sponding parts. Q p i A is my improved cylinder cock, the body of which is 'madewith a stub portion, a, that is to be tapped into thecylinder, and the outer portion, 1), which 'is screwed into a screwthreaded recess in the end of a, and carries the valve 0, so that by removing the outer por: tion, b, access is given to the valt e and the stud a may remain in the cylinder, thus saving recntting of-the joint with the cylinder in case :of renewal and repairs.

The inner end of b is formed as a seat for the valve, and the recessin a i-s made deep enough to give space for the movement of the valve.

The valve 0 is formed with a thimble portion, d, that sets over a tubular stem, 0, which is formed on b, and projects into the central opening of the portion b, whereby the valve'c is sustained by and moves on thestem e.

The aperture of the stem 0 connects with a cross-niortise,f, that is formed in the outer end of the cock,- and within the stem 6 is a pin, g, that bears upon valve 0 with its inner end, and at its outer end enters the cross-mortise f.

The device for setting the valve open consists of a bar or rod, h, fitting snugly in the cross-mortise f, so as to slide therein, and formed at its end with a recess, i, Wedgeshaped or inclined at its ends. The rod h is to be fitted at its outer end with a pin and but for connection to the usual devicesfor op- ,used for connecting the operating-rod of cylinder-cocks.

In the under side of the portion a is the outlet-opening k, which may be drilled straight orinclined, as desired. This opening k is to be of ample size, and the escapespaces at the inside of the cock being also PIODOI'tlOllitU-EIY large, there will be no back-pressure to force water out around the stem.

By the above-described construction the valve is free to move so as to close by pressure from the cylinder; and it may also revolve on the stem 0, so that the wear will be equal on the seat, and the "alve will always close tightly. The valve-c will also open instantly by suction in the cylinder when steam is cut off, thereby allowing air to enter for relieving the cylinder and packing from strain.

In opening the valve against pressure the wedge ends of the recess 5 in rod [tact against end of pin 9. I thereby obtain a powerful action, and, to assist themovement, the end of pin 1 will be rounded, as shown.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

In cylinder-cocks, in combination with the thiinble-valve c, fitted to slide on stem 6, the loose pin g, passing through stem 0, and the recessed rod It, fitted to slide in the cross-mortise f, constructed and arranged substantially as and for the purposes specified.

JAMES ALOYSIUS ROBINSON.

Witnesses:

W. T. FRANKLIN, CHARLES GRANT. 

